ucs bts range gneiss

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Effect of geomechanical properties on Cerchar Abrasivity ...

For metamorphic rocks, CAI increases with increasing UCS, BTS and brittleness index B 3. The coefficients of correlation are 0.48, 0.60, and 0.68, respectively. UCS is the common geomechanical property influencing CAI value for both rock types.

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CLASSIFICATION // CHARACTERIZATION OF SOME ROCK …

CLASSIFICATION // CHARACTERIZATION OF SOME ROCK FEATURES . Engineering characteristics of main rock material: ... C.Banded silicate minerals without continuous mica sheets Gneiss D.Randomly oriented and distributed silicate minerals of uniform grain size Granite, diorite, gabbro, syenite ... CLASSIFICATION FIELD TEST RANGE OF COMPRESSSIVE ...

11 Rock mass properties - Strona główna AGH

162 Chapter 11: Rock mass properties statistical curve fitting process is used to derive an equivalent Mohr envelope defined by the equation: B ci n tm A ci σ σ−σ τ=σ ' (11.2) where A and B are material constants ' σn is the normal effective stress, and σtm is the 'tensile' strength of the rock mass.

Some Useful Numbers

Some Useful Numbers on the Engineering Properties of Materials (Geologic and Otherwise) GEOL 615 Coefficient of sliding friction ( ) For most rocks, varies between 0.8 and 0.5.

Assessment of dynamic and static characteristics of ...

gneiss, and migmatite, and 24 samples from Site B, consisting of mostly quartz gneiss, biotite gneiss, and biotite-quartz gneiss. The length-to-diameter ratios for the samples vary between 2.1 and 2.2. 3 EVALUATION OF THE TEST RESULTS Figure 2 summarizes all of the 56 test data points with respect to the measured UCS and E

Geological controls on the breakthrough of tunnel boring ...

in fractured hard rock mass.Although the BTS of rock has little effect onTBM performance in fractured rock mass, the UCS of rock is an important parameter for evaluating the ROP (Figure 3).There is no universally accepted test to quantitative measurement of rock brit …

USING THE POINT LOAD TEST TO DETERMINE THE …

in a range between 16 and 24, with even lower values for some shales and mudstones. In studies comparing the PLT with the UCS, it is generally assumed the UCS test is the standard. In reality, however, UCS tests provide an estimate of the "true" UCS of the rock. The accuracy of the estimate depends on the natural

Utilizing rock mass properties for predicting TBM ...

Utilizing rock mass properties for predicting TBM performance in hard rock condition. Author links open overlay panel Saffet Yagiz. Show more. ... Manhattan schist is composed of gray, medium to coarse-grained layered schist and gneiss. ... including BTS, UCS and punch penetration tests, rock cores were taken from the tunnel side at 151 ...

Rock mass properties - Rocscience

Rock mass properties 3 One type of triaxial cell that can be used for these tests is illustrated in Figure 1. This cell, described by Franklin and Hoek (1970), does not require draining between tests and is

Drillability Evaluation of Limestone Rock Quarries in ...

Table 2 shows that the UCS of the limestone rock ranges from 24.62 MPa to 133.60 MPa and BTS ranges from 2.39 MPa to 8.31 MPa. BCs values (B 1, B 2, B 3, B 4, and B 5) determined from UCS and BTS displays a narrow range variation of values for B 1, B 2 and B4 while B 3 and B 5 have a wide range. Test results of SJ, S 20, DRI and

Empirical relations between rock strength and physical ...

Empirical relations between rock strength and physical properties in sedimentary rocks Chandong Chang a,⁎, Mark D. Zoback a,1, Abbas Khaksar b,2 a Department of Geophysics, Stanford University, Palo Alto, CA 94305-2215, USA b GeoMechanics International, Inc., Perth, WA 6000, Australia Received 1 April 2005; received in revised form 27 November 2005; accepted 11 January 2006

(PDF) Factors affecting the advancement of full-face ...

Amphibolite 161 9.9 43 56 28.3 1460 Orthogneiss 137 9.4 35 111 45.8 1625 Geometry of disc cutters, thrust, and power are Gneiss/schist 148 9.7 33 110 46.7 1610 the main machine parameters utilized in the CSM model together with intact rock properties; UCS and BTS.

DETERMINATION OF ROCK JOINT SHEAR STRENGTH …

DETERMINATION OF ROCK JOINT SHEAR STRENGTH BASED ON ROCK PHYSICAL PROPERTIES ... The range of UCS from ISRM field-determined method agrees well with the corresponding value determined by ASTM laboratory testing. Variations of the UCS by 25 MPa for weak and medium rocks (R2 and R3) and by 50 MPa for strong and very ...

Suitability of Brisbane Rock Conditions to Roadheader ...

Suitability of Brisbane Rock Conditions to Roadheader Excavation by Jody Herley Roadheader excavation has typically been limited in its ability to cut hard rock. Despite this, a number of tunnelling projects being implemented in South-East Queensland are utilising roadheaders to excavate sections of the tunnel which pass through the

Correlation between Uniaxial Compressive Strength and ...

range from 0.36 MPa for the Jutana Sandstone to 5.24 MPa for the Dandot Sandstone. The coefficient of variation ranges from 5.3 % for Dandot Sandstone to 60.7% for Jutana Dolomite. Broch and Franklin [5] report that the point load test results are less scattered as compared to the UCS test results, whereas Bieniawski [6] reports just the opposite.

Comparative evaluation of Schmidt hammer test procedures ...

between UCS and BTS with SH is still unclear and it should be studied further. For this, one needs to understand better the correlation between UCS and BTS with SH, when the SH test procedure is considered as the affective factor on these parameters. This study is …

Relationship between brittleness of rock, CAI and cutting ...

Gneiss #1 167.5 10.6 15.80 0.881 29.79 Gneiss #2 91.5 15.2 6.03 0.715 26.35 Gneiss #3 123.8 11.2 11.02 0.833 26.36 ... UCS and BTS are basic input parameters to estimate cutter forces in empirical TBM performance prediction model. Figures 3 and 4 shows the relationship between MNF, UCS and BTS. However, the cutter forces are highly affected by ...

Estimation of uniaxial compressive strength of rock ...

Estimation of uniaxial compressive strength of rock materials by index tests using regression analysis and fuzzy inference system Article in Engineering Geology 160 · April 2013 with 4,019 Reads

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Predicting the compressive and tensile strength of rocks ...

The average values of the IHI, UCS, and BTS are listed in Table II. It can be seen that IHI, UCS, and BTS values have wide ranges. Figures 6, 7, and 8 show the histograms of IHI, UCS, and BTS values. The IHI values range from 3.7 kN/mm for the Mut/Icel travertine to 186.5 kN/mm for the Altinhisar/Nigde basalt. The UCS values range from

(PDF) Correlation Between Uniaxial Compressive Strength ...

Correlation Between Uniaxial Compressive Strength and Brazilian Tensile Strength Using Different Rock Types Conference Paper (PDF Available) · January 2015 with 147 Reads How we measure 'reads'

Unconfined Compression Test | Geoengineer.org

The Unconfined Compression Test is a laboratory test used to derive the Unconfirmed Compressive Strength (UCS) of a rock specimen. Unconfirmed Compressive Strength (UCS) stands for the maximum axial compressive stress that a specimen can bear under zero confining stress.

Estimating the Intact Rock Strength of a Rock Mass by ...

caused by the definition of intact rock strength and using strength values based on UCS laboratory tests are: • The UCS includes discontinuity strength for rock masses with small discontinuity spacing. The UCS test sample is most often about 10 cm long and if the discontinuity spacing is less than 10 cm the core may include discontinuities.

(PDF) TBM performance prediction based on rock properties ...

The load including UCS, BTS, PI, α, Fs have been given as an and displacement of the indentor are recorded with a example in Table 2. computer system. The slope of the force-penetration UCS of rock in the database ranges from 100 to curve, named as PI, indicates the excavability of 200 MPa.

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Factors influencing performance of hard rock tunnel boring ...

Factors influencing performance of hard rock tunnel boring machines S. Yagiz ... diorite gneiss, tonalite, pyroxene-garnet gneiss, and biotite-hornblende gneiss, intermixed with granite ... UCS and BTS. Figure 1 is an example of perform-

Point Load Test on Meta-Sedimentary Rocks and Correlation ...

The correlation factors between UCS and Is(50) values for meta-siltstone and meta-sandstone fall in the range of 20–21, which is typical for harder rocks, as found in the literature. The correlation factors between BTS and Is(50) values for these two rocks range between 0.62 and 0.96, where BTS is less than Is(50). 3. 4. 5.

ROCK CUTTING PRINCIPLES

Quartz Gneiss 4.3 Georgia Quartzite 4.3 East Africa Gneiss 4.4 Norway Sandstone 4.7 Kentucky Quartz Gneiss 4.8 Norway Granite Gneiss 4.8 Norway Mica Schist 5.3 New York Quartzite 5.9 Norway. Effect of Joints/Fissures. Thin-Section Petrographic Analysis ... High Tensile Strength (low UCS/BTS ratio) ...

Comparative study of TBM performance prediction models

Comparative study of TBM performance prediction models *Tae Young KO1), Seung Mo SON2) and Taek Kon KIM3). 1), 2, 3) SK Engineering & Construction, Seoul, 04534, Korea [email protected] com. ABSTRACT . In this study, the most widely used performance prediction models for TBMs were